Eternal Witness + Roon of the Hidden Realm + Time Warp

Mana needed: {5}{U}{U} each turn

GWU identity

Commander legal

The 3 combo pieces

What must be in place

Roon does not have summoning sickness.

How to execute it

  1. Cast Time Warp by paying {3}{U}{U}, causing you to take an extra turn after this one.
  2. Activate Roon by paying {2} and tapping it, exiling Eternal Witness until the beginning of your end step.
  3. At the beginning of your end step, Roon triggers, returning Eternal Witness from exile to the battlefield.
  4. Eternal Witness enters the battlefield, putting Time Warp into your hand from your graveyard.
  5. Repeat each turn.

What the combo produces